Water is to be used to absorb acetone from a dilute mixture with air in a tower packed with 3.5-in. metal Pall rings. Average conditions in the tower are:

\[\text { Temperature }=25^{\circ} \mathrm{C} ; \text { pressure }=110 \mathrm{kPa}\]

Liquid Phase 

Water \(=1,930 \mathrm{kmol} / \mathrm{hr} ;\) acetone \(=5 \mathrm{kmol} /\mathrm{hr}\)

Density \(=62.4 \mathrm{lb} / \mathrm{ft} 3\)

Surface tension \(=75\) dyne \(/ \mathrm{cm}\)

Vapor Phase 

Air \(=680 \mathrm{kmol} / \mathrm{hr}\)

Water \(=13 \mathrm{kmol} / \mathrm{hr}\)

Acetone \(=5 \mathrm{kmol} / \mathrm{hr}\)

Determine the column diameter for operation at \(70 \%\) of flooding.